A signal transmission system includes a switch component and a choke component each coupled to one of a first power wire and a second power wire, a first conductive path between the switch component and a load, a second conductive path between the choke component and the load, and a control block. The control block controls the switch component to not conduct when providing a control signal to the first and/or second conductive paths. When the switch component does not conduct, a magnetic core of the choke component does not reach magnetic saturation. When the switch component conducts, the magnetic core of the choke component operates at magnetic saturation.
